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A. DUPLEX STUD FORMING MACHINE Filed Feb. l, 1921 ll Sheets-Shea?l l Patented ug. 14, 1923.

intatte rais Parana ortica.

OSCAR A. SMITH, OF EAST CLEVELAND, AND GEORGE J'. LIEBER, OIF CLEVELAND, OHO,

ASSIGNORS TO THENTIONAL ACME COMPANY,FOF CLEVND, OHIO, A CORFO- RATION OF OHIO.

Application filed February 1, 1921.

To all. whom t may concern:

Be it known that we, OSCAR A. SMITH and GEORGE J. Lamm, both citizens of the United States, said Smith residing at East Cleveland, and said Leber at Cleveland, in

the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Duplex Stud-Forming Machines, of which the following is a speciication.

This invention relates to metal working machines, the object thereof being t provide a duplex metal working machine comprising a pair of duplicate rotary blank carriers and opposed duplicate sets of endwlse working tools,.between which opposed sets of tools the blank carriers are supported for intermittent rotation, each set of tools cooperating with a carrier.

1n the present instance, the duplicate sets of end working tools are shown as stud pointing and threading tools, although slotting and milling tools or other forms of tools may be used if desired, and therefore although the machine is shown and described, because of the particular tools illustrated. as an automatic stud pointing and threading machine, it is to be understood that work other than pointing and threading the blanks could be performed by merely changing the tools carried by the tool spindles and without in anyway modifying or changing the construction and operation of the several mechanisms.

One of the objects of the invention is the provision of a machine of this kind in which several blanks, four in the 'present instance, can all be operated upon simultaneously, duplicate operations being performed upon the blanks during each indexing of the blank carriers and in substantially the same time that it has heretofore taken to perform one`operation of a similar kind, thus very materially increasing the output of the work, and consequently lessening the cost thereof, since obviously this machine in the care of one operator can do the work of two independent machines, each requiring its own operator.

In the drawings accompanying and forming a part of this specification, F-ig. 1 is a perspective view illustrating one side of this improved machine, or that side which may be designated as the pointing spindle side; Fig. 2 is a side view illustrating the Serial No. 441,511.5.

half of Fig. l; Fig. 4 is a perspective View' of the same side of the machine shown in F1g. 1, but illustrating the mechanisms on an enlarged scale, at the center of the machine; Fig. 5 is a perspective view of that side of the machine shown' in Fig. 2, but illustrating on an enlarged scale certain of the mechanisms thereof at the right hand half of said Fig. 2; Fig. 6 is a perspective side view illustrating on an enlarged scale certain of the mechanisms shown at the right hand half of Fig. 1; Fig. 7 is a perspective view illustrating on an enlarged scale certain of the mechanisms shown aty the left hand half of Fig. 2; Fig. 8 is a perspective view illustrating on an enlarged scale a part of the driving mechanisms for the turrets and the end working tools shown at the left hand end of Fig. 1; Fig. 9 is a right hand end view of the machine illustrated in Fig. l; Fig. is a left hand'end view of the machine illustrated in Fig. 1; Fig. 11 is a crosssectional View taken on line 11-11 Fig. 1; Fig. 12 is across sectional view taken on line 12-12 Fig. 1; Fig. 13 is a perspective, diagrammatic view illustrating the direction in which the turret is indexed and the operation of the tools upon the blanks carried thereby; Fig. 111 is a cross sectional viewtaken on line 14-'14 of Fig. 1; Fig. 15 is a vertical sectional view taken on line 15-15 of Fig. 14; Fig. 16 is a detail sectional view of the turret locking mechanism; Fig. 1? is a detail perspective view of one set of gripping blocks; Fig. 18 is a detail sectional view of one of saidA blocks; Fig. 19 is a perspective detail, partly sectional view, of one of the bushings for the turret; Fig. 20 is a sectional plan view of the layout of the blank carriers and duplicate sets of endwise working tools; Fig.

21 is a cross sectional view taken on line 21-21 of Fig. 1; Fig. 22 is a longitudinal sectional view of the worm shaft mechanism for operating the worm vwheel and corresponding parts in the different figures of the drawings, but as the mechanisms at each side or face Iof 'the duplex blank car-` rier are in many instances duplicates of each other, the reference characters at one side of the turret will be used for the duplicated parts at the opposite side of the turret with the addition of prime marks. Therefore a description of the mechanisms at one end applies to the duplicate mechanisms at the opposite end and which are herein designatedwith the same reference characters with the addition of 'the primel marks.

Tn the present improvement, the rotary blank carriers are shown supported substantially centrally of the length of what may be termed the main driving shaft', and this pair of blank carriers or disksA are shown rigidly connected together by webs, thus forming a duplex blank carrier or turret.

Tlie driving mechanism for the cam shaft, .by means of which the turret is indexed and by means of which certain of the mechanisms are actuated, and the driving mechanism for the main driving shaft and from which the tool spindles are driven, is in the present instance shown at the left hand end of the machine illustrated in lFig. 1.

Of course it will be understood that elec` trically driven means, such as motors, could be used for driving the several mechanisms, but in the present improvement the main driving shaft is driven from one belt pulley while the cam, shaft .actuating means is driven from another belt pulley.

The present improved duplex metal working machine comprises in a general way a rotary duplex turret including a pair of blank carriers, means for indexing it intermittently, means for locking the turret in its indexed position, duplicate sets of opposed tool spindles located at opposite sides or faces of the turret and shiftable toward and from the turret, means for feeding blanks to one ofthe blank carriers, means for pushing the blanks from the blank carrier into its companion blank carrier, and gripping means for gripping the blanks in the blank carriers. Thus, starting with the feeding of the first blank (see Figs. 13 vand 14), the blank will -be Vfed from a suitable ma azine to one blank carrier, thence car` rie on the indexing of the turret into position to be ,worked upon as, for instance pointed, whereupon it is carried as the turret is again indexed, to the opposite sideof the machine through several, as three, idle stations and into position to be threaded, thence on the indexing of the turretdt'is carried into position to be ushed from the first vcarrier into the secon carrier, whereupon as the turret is a ain indexed it is carried through several i 1e stations, as two,

into position to have its opposite end pointf ed, and thence on the indexing of the turret the blank is carried again back to the opposite side of the machine through several idle stations, as three, into position to be threaded and then on the next indexing of the turret it is carried into position to be pushed out of or ejected from the second carrier by the feeding ofa new blank from the first carrier into the second carrier, it requiring in the present instance fourteen indices of the turret after the blank is fed thereinto to fully complete a work blank that is pointed and threaded at both ends, but as awork blank is fed into the turret from the magazine at each indexing of the turret it follows that after the carriers have been completely loaded, a completely formed blank pointed and threaded at both -ends will bedischarged from the turret at each indexing thereof.

In the present improved machine organized as shown herein, it will be observed that the two pointing tool spindles are located at the same side of the machine, as

for instance, the front side in Fig. 1, one at each side of the turret, so that they are opposed to each other, while the two threadin die spindles are located at the opposite si e of the machine, one likewise at each side of the turret while they likewise are opposed to each other. Consequently in the present organization, after a blank has been pointed, say in blank carrier 6', it passes through several idle stations, as three, to the opposite side of the same carrier 6 and diametrically opposite the pointing tool,

where it is then threaded. At the next inl dexing of the carrier, it passes from carrier 6 to carrier 6 and then carried through two idle stations into position to be pointed at the opposite end, and then again to the opposite side of carrier 6 to have its opposite end threaded, subsequent to which it is ejected as before explained. Thus both pointing tools are in alinement with each other at the same side of the machine, and are shifted simultaneously toward and from 'the turret, and the two threading dies are likewise in alinement and are shifted simultaneously toward and from the turret, so lthat when the blank carriers are completely loaded, two blanks are being pointed and two blanks are being threaded all at the same time.

In the preferred form thereof herein shown and described, this --improved machine, as -organized for pointing and threading studs, comprises a suitable pan 2, having legs 3, and to the top Aof which pan is bolted a bed 1. Suitably tongued and bolted to the top of this bed 1 is a bearing 4 for the reception of the stock gripping disk or blankI carrier shaft 5 (see Fig. '15), which shaft 5' is a hollow shaft, and to Maaate webs or ribs, thus forming what may be designated asa duplex turret or blank carrier.

To .the opposite end of the shaft 5, which is mounted in the bearing 4, and having a bearing against the end of this bearin 4, there is secured in a suitable manner in exing gear 7, which4 gear is intermittently engaged by a fan gear 8 (see Figs. 2 and 5) carried on the cam shaft 200, and by means of which fan gear the duplex turret is intermittently rotated or indexed, the indexing gear 7 having, in the present instance, eight series for sets of spaced teeth, with each several seits of which the fan gear engages during the rotations of the cam shaft.- Loosely fitted on the end of the shaft 5 and adjustably bolted to the indexing gear -7 by means of a pair of bolts and velongated slots, is indexing plate 9, the elongated slots 10 ermitting circular adjustment of this in eX- ing plate. VThis plate is provided with eight notches or recesses 11 corresponding with the number of sets of gear teeth of the indexingt gear 7. Cooperating with these notches is a suitable locking mechanism comprising a shitable locking bolt 12 located '1n a bolt bearing13 secured to the bed of the machine. The inner end of the bolt is machined to properly engage the notches or recesses 11 of the index plate 9. The outer end of this lock bolt is provided with a slot for the reception of the upper end of a lever 14 (see Figs. 3 and 16) pivoted to a bracket 15 bolted to the side of the bed 1. v

The opposite end of the lever 14 is actu'- a-ted by a suitable cam or cam disk 16 securedl to the cam shaft 200 and carrying suitable dogs 16a in the well known manner of a National Acme automatic screw machine, and' the engagement of -this lever with the cam dogs is maintainedby means ofa spring 14a' secured to the bolt bearing 13 and to a pin on the upper end of the lever 14, thereby to lock the duplex turret or blank carrier each time it is indexed.

Adjacent to the ends of the bed and in line with the hollow shaft 5, there are bolted main drive shaft bearings 17 and 17. Housed in these bearings 17 and .17 and having a bearing in each end of the hollow shaft 5 (see Fig. 15) is main drive shaft 18. Thus, this shaft extends from end to end of the machine and the duplex turret is 'shown located centrally between the ends pan 2 andmounted on the sha-tt 18 is main driving pulley 20. Secured to the bed at each side of the duplex turret are two bearings 21 and 22, and in these bearings 21 and 22 islocated a tool spihdle 23 herein designated as the pointing tool spindle. Secured to the pointin tool. spindle 23 is a spool or grooved mem er 24, and projecting through recesses in the bed and pivoted to the bed is a pointing spindle 4lever 25 and td the up er end of this lever 25 isa bronze dog, w ich enters the greoved portion of the spool, and to the lower end of v'the lever is a stud roller in position to come in Contact with suitable cams mounted on the cam drum 26 fastened to the cam shaft 200, and by this means the two tool spindles 23 and 23 are shifted toward and from the duplex turret. ln the present instance these tool spindles23 and 23 are shown as carrying a pointing tool or pointing box 27 for pointin the studs, the two ointing tools 27 an 27 being located in a inement and opposed to each other, one at each side or side tace of the duplex turret, and by the means just described on the rotation of the cam shaft the two pointing spindles are shifted toward and from the blanks in the duplex turret, so that when the turret is properly loaded, these two ointing spindles will be operating on two in ependent blanks to point them both at the saine time. For rotating the pointing spindles, the main driving shaft 18 has keyed thereto a relatively long spur ear 28, and mounted on the pointingspind'le 23 between the bearings 21 and 22 in position to mesh with the gear 28 is a traveling spur gear 29, that is to say, this ear moves with the pointing spindle, ,whic is permitted by the length of the spur gear 28. Consequently as the main shaft is rotated by the pulley 20,r the pointing spindle shafts are rotated through the gears 28 and 29 and gears 28 and 29.

0n the opposite side of the bed, and therefore at the opposite side of the shaft 5, and its bearing 4, and suitably bolted to the bed, are die spindle bearings 30 and 31, and housed, in these bearings parallel with the main driving shaft 18 and with the ointing spindle shaft 23 is a die spindle s aft 32..

portion of the bearing 41,7 by a suitable boltA 34 extending through anarcuate slot 35. Fastened to` the main drivin shaft 18 by a suitable key and set screw 1s a spur gear 36, and this spur gear is in mesh with an intermediate spur'gear 37 carried b a stud secured to the rocker arm 33. 'll e spur lll5 gear 37 is in mesh with another intermediate spur gear 39 likewise carried by a stud secured to the rocker. arm 33, and this last spur gear meshes with a spur gear 40 loosely mounted on the die spindle 32, and this gear 40 is maintained in its proper place on the die spindle 32 by some suitable means not herein shown. -This gear 40 is provided with a slotted driving sleeve 41. To the rear end of the die spindle 32 is fastened a dog 42, which is located within the end of the sleeve 41, in other words it telescopes therein. To the periphery of this dog 42 is fastened a pair of stud rollers 43 projecting into the slots of the sleeve 41 of the gear 40, whereby on the rotation of the lgear 40 from the main driving shaft through the medium of the gears 36, 37 and 39, the slotted sleeve 41 and the said gear 40 will be rotated thereby to rotate the die spindle while at the same time the reciprocating movement of the die spindle back and ,forth is permitted relatively to its gear 40 and sleeve 41 by reason of the slots 44. Thus, by means of this gear mechanism just described the die spindle is rotated from the main driving shaft 18, while at the same time the die spindle is permitted to be shifted toward and from the duplex turret in a manner which will be readily understood. The rocking arm 33 and its arcuate slotl permits the swinging adjustment of this arm 33 on the shaft 18 thereby to substitute different gears, and consequently a change in the speed of the die spindle.

The. bearing 17 and rocker arm 33 at the opposite end of the machine are slightly different in shape than the bearing 17 and rocker arm 33, and there is one less intermediate gear used in the train of gears 36', 39 and 40 from the main shaft to the die spindle shaft, but otherwise the construction is the same. The reason for this difference in the number of gears is that both die'spindles are rotated from the main driving shaft 18, which always rotates in the same direction, but as it is necessary to rotate one die spindle in one direction and the other in the opposite direction, therefore one less intermediate gear is necessary to accomplish this result.

From the foregoing it will thus be seen that both pointing spindles 23 and 23' and both die spindles 32 and 32 are rotated from the main driving shaft 18 by the gearing hereinbefore described, while 'both pointing spindles are reciprocated toward and from the duplexr turret,'as is also the case with the two die spindles, this being permitted by the slotted sleeves 41 and 41 hereinbefore described. Carried at the inner end of each die spindle is what is known as a self-opening National Acme die 45. Suitable mechanism is provided for shifting the die spindies 32--32i toward and from the turret, and for opening and closing the dies at the proper time to permit the saine to properly thread the blanks. This mechanism for reciprocating the die spindles and operating ythe dies it is not deemed necessary to show and explain in detail herein, since it is fully shown and described in Patent No. 1,315,427 dated September 9, 1919 issued to @scar A. Smith and Benjamin B. Rindfleisch, assignors to The National Acme Company, the assignee of the present invention, and therefore it is merely necessary to say herein that a part of this operating mechanism for the die spindles comprises the arms 79 and 80 carried by the sliding rods 67 and 68 oonnected by a dog 69, to which is pivoted a link 70, to which is pivoted the upper end of die spindle operating lever 73 pivoted to the side of the bed 1, and to the lower end of which lever 73 is secured a stud and' roller 74 in position to be engaged by suitable cams at the proper time on the cam drums 7 6 carried by the cam shaft 200. (The set of reference is such that the die spindles will be shifted toward the turret, the dies are Ythen closed or set, and as thedie spindles and the dies are rotated, the work will be threaded. Thereafter the dies are opened to release the work and the dies and the spindles shifted away from the turrets in a manner which Will be readily understood by reference to said patent, wherein there is a full and complete description commencing with page 4, line '74 of this entire mechanism.

For driving the cam shaft 200. there-is housed in suitable bearings of the bed 1 between the main driving shaft 18 and the cam shaft 200, and at right angles to these shafts. a worm shaft mechanism (see Fig. 22). This worm shaft mechanism comprises a hollow worm shaft sleeve or bracket 46, which acts as a bearing for one portion of the worm shaft 47. The sleeve bracket 46 is provided with a flanged portion or end, by which means it is bolted to the bed 1, which is suitably bored for this purpose. A sleeve 48 having a bearing in the bore of the bed 1, forms a bearing for the other end of the worm shaft 47. To the inner end of this sleeve 48 is keyed a worm 49 in position to mesh with a worm wheel 50 fastened to the cam shaft 200. A ball thrust 51 is housed between the inner end of the bracket sleeve 46 and the inner end of the sleeve 48. To the outer end of sleeve 4S and the worm shaft 47 arev secured suitable change gears 52 with safety tripping mechanism, such as is used on the we nio lateral movement by a collar 55 fastened to the worm shaft 47; The outer face of pulley 54 is lprovided with a clutch member 56. To this end of the worm shaft 47 is keyed for slidin movement a cooperating clutch member this member being held however, for rotary movement with the shaft. j

Bolted to-the side of the bed is a bracket 58 (See F ig. 3) and to this bracket is pivoted a cont-rol le'ver 59, which is provided with a pair of shoes fitting in a groove of the clutch member 57.` By means' of this control lever 59 the clutch members may be connected and disconnected, thereby to connect and disconnect the worm shaft 47 with the driving pulley 54. Thus, by means of the driving pulley 54'the clutch members 56 and 57, the worm -shaft 47, the change gears 52, the worm 49, and worm wheel 50, the cam shaft 200 is driven in a manner which will tailed description.- From the description thus far given, it will be observedA that the die spindles and the pointing spindles are driven from the main shaft carrying the driving pulley 2O while the cam sha-ft with its various cams for operating the several levers, Ietc.` is driven from the driving pulley 54 through the medium of the transverse worm shaft 47 and the change gears 52 just described. These gears'52 are en closed in a suitable casing having a suitable cover 61(see Figs.*2 and'y 5).y

Bolted to both sides of the bed 1 near the top of the same are two rectangular side bars or arms 62 (see Figs. 1 and 2). Bolted to and between these two side bars at a suitable distance from the end of the-bed 1, is a cam shaft su porting bracket 63 hav ing a lower exten ing portion for supporting the extreme 'end of the cam shaft 200. Suitable means is provided for taking up the lengthwise play ot the'cam shaft 200, and this meanscomprises in the present instance, a housing bracket or socket 64 bolted to the bracket 63. lnside each of these sockets is a recess for the reception of a4 hardened plate, in engagement with which and carried by the socket is a set screw 65,

and between the hardened plate andthe end play of the cam shaft will be quickly taken up in a manner which will be readily understood, sincethere is a similar adjusting means carried by the bed at the opposite end ofthe cam shaft,;so that when the set screws are properly adjusted, the adjustment of the 'ca shaft will be maintained. A further detailed description of this adjusting means is not deemed necessary, since it is clearly shown anddescribed in the National Acme Company Batent No. 1,318,116 dated October 7, 1919 (see Fig. 2).

Theworm wheel 50 may be secured to the camshaft 200 by suitable safety mechanism, such as that shown and described in Patent No. 1,318,116 dated IOctober 7, 1919 (see Fig. 6) or Patent No. 1,320,609 vdated November 4, 1919 '(see Fig. 12), both 'owned by The National Acme Company.

The construction of the duplex turret is .as follows, but as theconstruction of each blank carrier 6 and 6 is the same, a description of one will therefore be deemed sufficient, and as these blank carriers are duplicated, the reference characters applied to both will be duplicates, except that the prime mark will be used in connection with one set of these reference characters:

Milled in the face of each of these blank carriers at an equal distance apart are eight suitably tongued recesses-7 7, the tongued recesses 77 of the blank carrier 6 being opposed to those of the recesses 77 of the blank carrier 6. ln each of these tongued recesses is located a pair of flanged gripping blocks 78 and, 79a (see Figs. 17 and 18), the flanges of the blocks forming guides for maintaining the blocks in position in the tongued recesses. The block 79a is firmly fastened against movementwhile the block 78 is mountedto slide toward and from the block 7 9a. At the outer end of sliding block 78 is located an adj ustirig screw and lock -nut 80a. The opposed ends of these gripping blocks 78 and 7 9a are machined to conform to the diameter of the work or stock that is to be operated upon, and into the inner or each of the shift-able blocks 78 there is provided arspring 85 located in a portion of the tongued slot of the blank carrier, one end of this spring 85 engaging a wall of the blank carrier while the other end impinges y against a pin386 carried by the sliding block 78, and which pin moves in a`portion of the tongued slot of the blank carrier.

In line with the machined ends of the opposed gripping blocks is a bore extending through the blank carrier orfdisk, which is large enough to be suitably hushed with vio ' thereof is located a gripping block operating plunger 91 and 91', it being understood that there are two of these at each side of the machine (see Fig. 14). lin other words, there are two duplicate plungers at one side of the machine to cooperate with the blank gripping blocks during the time that the blanks are being pointed, and there are two similar plungers at the opposite side of the machine to cooperate with 'the blank gripping blocks during the time that the t'wo blanks are being threaded, anda description of one will therefore be deemed sutlicient for all four. One end of each of these plungers 91 projects beyond its bearing. in position to contact with the adjusting screws 80a of the sliding gripping block 78 after the indexing of the turret` at the proper time. The other end o f this plunger comprises a cup-shaped portion 92 sliding in its bearing and an extended stem or spindle 93 on which is located a compression spring 94 and on this spindle is -loosely mounted a similar cup-shaped portion 95, and between which cup-shaped portions the spring is mounted and housed. To each of the bearing brackets 90 and 90 is -pivotally secured a lever 96, to the lower ends of which are fastened suitable studs and rollers to cooperate with suitably mounted cam disks 97 and 97 carried by the cam shaft 200. By means of these cams the levers 96 and 96 are operated at the proper time to shift the plungers, the spindles of which extend through the upper ends of the levers and are secured thereto, so that these plungers will engage the headed screws 80a of the shiftablegripping blocks and move them inward against the action of the springs 85, so as to properly grip the work or blank, and hold such bla-nk firmly in-position to be operated upon, the springs 85 of the sliding gripping block moving lthe gripping block away from the blank when the plungers are forced back by the compression springs 94.

A bracket 100 (see particularly Figs.` 4, 6 and 21) is secured to the bed of the machine in front of the blank carrier 6 at a suitable distance therefrom and to the top face of this bracke-t is fastened a magazine 101 for the reception of the blanks to be fed to the duplex turret, and the blanks are fed into position to be pushed into the duplex turret by suitable mechanism, a part of which comprises a lever 102 pivotally bolted to a part of the bracket 100, the lower end of which is operated by suitable cams and cam drum 99 carried on the cam shaft 200, and the upper end of which lever 102 is linked to a slide bar or plate 103, which plate is provided with a slot adapted to receive a blank from the mouth of the magazine and feedv it into a recess or trough-shaped member. or sleeve 104 (see Fig. 7), from which position itis pushed forward by a -pusher rod hereinafter described, into the turret. ylin the present organization it will -be observed that the feed rods hereinafter described and the magazine just described are located to `cooperate with the blank carrier 6',in other words they are located at the right hand end of the machine in F ig. 1.

A. detailed description of the construction of this magazine and its operation is not deemed necessary herein since it is clearly shown and described in vPatent No. 1,315,416 dated Septemberv 9, 1919 owned by The National Acme Company. Of course other means for feeding the blank might be used, but the construction described in the patent referred to is deemed the preferable means, since it overcomes many disadvantages of various blank feeding means theretofore used. By means of this blank feeding means, one blank at a time relieved from the pressure of all the blanks in the magazine can be fed into the blank carrier 6 of the duplex turret at the proper time by the means about 'to be described.

Located in a horizontal position, a suitable distance away from each other and from the end of the bed, are a pair of parallelly located uide bars 105 (see Fig. 6), the innerends 0% which are housed in the bed of the machine, while the outer ends are housed in the cam shaft supporting bracket 63. Mounted to slide on these guide bars 105 by means of suitable bearings, is feed rod operating slide 106, and this slide is shifted back and forth on its guide rods 105 by a suitable stud and roller` located at the underside of the slide in position to be engaged by suitable cams located on a cam drum 110. On the underside, at each end of the slide 106 are pivoted dogs 107, into the end of each of which is fastened a feed lever operating rod 108 (see Fig. 9). The other ends of vthese rods pass through suitable bores in the feed operating levers 109, and are held in connection therewith by suitable collars. The two levers 109 are pivotally bolted at their lower ends to brackets 111 secured to the bed bars 62. The upper ends of these levers 109 are provided with laterally extending studs and dogs 112 (see Fig. 9) adapted to project into the grooved portions of feed rod spools 113 carried by the blank feed rods about to be described. Bolted to the upper face of the cam shaft supporting bracket 63 is a rearwardl curved bracket 114 and in the upper end o this bracket the two 'feed rods for the blanks 115 and 116 are housed for sliding movement. Thesefeed rods are 'also supported adjacent to their forward ends by other suitablebrackets 117.

Springs 118 in conjuction with suitable collars 119 located on these feed rods act as cushions or buffersl to eliminate a positive thrust when feeding the springs being located between the grooved spools and the collars positioned forwardly of the spools, one end of each spring engaging a. grooved spool and the opposite end a'collar.

lFrom the foregoing, it will therefore be observed that when the cam drum 11() through the medium of the proper cams, shifts the slide106, the levers 109 will be swung to shift the sliding feed rods 115 and 116 forward and backward.' The feed rod 115 will thereupon push the blank dropped from the magazine into position into the blank carrier 6 whereupon'on the next indexing of the carrier this blank will be suitably pointed while the feed rod 116 acts to push a blank which has been both pointed and threaded from the blank carrie-r 6 into the blank carrier 6 in readiness to-Sbe carried into position to be pointed and threaded, and also acts to eject this self-same blank after it has been pointed and threaded.

' at its opposite end by reason of the ,n fact that as one blank is pushed from the blank carrier 6 into the blank carrier 6, the blank therein which has been completed is pushed out. Of course the feed rod 116 will be given a greater lengthwise movement in order to carry the blank completely from the blank carrier 6 into the blank carrier 6 to the front of the same to permit it to be operated upon by the pointing and threading tools.

Of course it will be understood that while th /details of the cams are not herein particularly illustrated. or described, that these `cams are constructed and timed to accomplish the various operations of the machine,- in other words, proper cams are used to accomplish the desired work and as these cams are well known and understood, a detailed showing thereof is not deemed necessary. /In certain classes of work, it is sometimes desirable to drilla piece of work at right angles to the length thereof. When this is desired, an additional/fixture may be used (see Fig. 14), and which is shown in a general way at' 125. This fixture may be bolted to the bed of the machine by a suitable bracket in front of either of the blank carriers 6 or 6', according to which endjof to the work may be obtained by a suitable grooved collar 128, cooperating with which means, and its operating parts, which might be used, since obviously a different operatingmeans could be provided if desired. l

riefly, the operation of this machine is as follows:

A blank from the magazine is pushed forward and fed into that particular pair of grip blocks, the bores of which are in line with the blank. Thereupon the turret is indexed downwardly to the next station, which thus brings the blank in line with the Apointing spindle directly underneath the magazine. At' this time of course another blank is fed into the next succeeding grip blocksv As .the blank is brought into position opposlte the pointing spindles, the grip blocks by means of the lever 96, and its cooperating plunger, securely grip the blank so that 'ping blocks in line with the feed rod 115,

a blank of course is fed into the blank carrier y6. Tn other words, a repetition of the blank feeding and blank pointing occurs on every indexof the duplex turret.

Eventually, this brings the first blank which has been pointed downwardly and around to the opposite side of the machine and in line with the threading die spindle, whereupon it is again gripped by the gripping blocks through the medium of its plunger and lever 96', and as the die'spindle is fed forward the stud is properly threaded. The duplex turret is then carried `or indexed, one stationthat is, up

lwardly-from the `threading die spindle,

thus bringing the blank into line with the feed rod 116, which, bymeansof the mechanism hereinbefore explained, pushes. this pointed and threaded stud or blank from the blank carrier 6 into the blank carrier v6 into position to be gripped by a pair of grip blocks in precisely the same manner hereinbefore described. rThereupon, as the llll duplex turret is indexed through several stations, the blank carrier 6 carries this blank into position in line with the point-- and as this threading die is' fed forward,

it is threaded so that at this time the blank has both ends pointed and both ends threaded. Thereupon upon the next indexing of the turret, the completely pointed and threaded blank is carried to one station above the threading dies and as the feed rod 116 forces a half completed blank from the blank carrier 6"- into the blank carrier 6, this operation forces out or ejects the completely threaded and pointed blank. The spring actuated jaws 81 andv 82 of the grip blocks hold the work blanks in their proper positions at those'times when the grip levers are not op* erating lupon the grip blocks.

From the foregoing, it will be observed that each blank may have all of its operations performed thereon after it is once placed in the magazine without any handling or reversingof the blank, so that this machine is a radical departure from and a decided improvement upon the machine shown and described in Patent N o. 1,315,427 dated September 9, 1919 hereinbefore referred to, inasmuch as that machine can perform but one operation out of adeinite four in the manufacture of studs, that is to say, in that machine the blanks must be first placed in the magazine and fed into position to have one end pointedbya suitable point? ing tool in place of the threading die there shown. After this end is pointed, the blanks must be then handled again to replace them in the' magazine, yreversely, so that the 0pposite end can be fed into position to be pointed'. Subsequent to this the blanks must be then rehandled and again placed in the magazine, and a threading die must be substituted for the pointing tool, whereuponV one end of the blank is threaded. Subsequent to this the blanks must be again rehandled and reversed to place them in the magazine in position to have the opposite end threaded by the threading tool, this thus requiring two reversals of the blank, threehandlings thereof, and the substitution of a threading tool forv a pointing tool in order to do the work thatis done by this single machine, or'else the blanks must be -pointed on some other machine in the first place, one

end at a time, and then threaded one end at a time on the machine shown in said patent, whereas in the present improved machine all of these four operations are performed upon every index of the turret and in the ap proximate time that it takes to perform a single operation of either pointing or threading in the patent to which reference has just been made. So that, it will be seen ythat since the present improved machine will perform four operations while the machine shown in the patent, to which reference has just been made will perform but one in the same space of time, it follows that the output of this improved machine is very materially increased and the cost of such output therewith very materially decreased. lt will be understood that the various details may be more or less changed without departing from the spirit orv scope of the present improvement as defined in the claims;

ln the diagrammatic View shown in Fig. 13, the loading position of the blank carrier is shown at 1, where it receives its blank from the magazine. The first pointing position is shown at 2. The idle stations are shown at 3, 4 and 5. The first threading position is shown at 6, and at 7 the blank is pushed from one blank carrier therethrough into the back of the other blank carrier indicated as at 7. lFrom thence it Ipasses through several idle positions 8 and. 9 to the position indicatedby 2', which is exactly opposite the pointing tool indicated at 2, where the oppositel end is pointed, and from thence it passes through the positions indicated by 3', 4 and 5 to the position 6b where its opposite end is threaded and then to the position 7 where it is ejected.

As the pointing spindles are shown in the present instance as being rotated in the same direction, right and left hand tools will of course be used in connection therewith.

We claim as our invention:

1. ln a metal working machine` the combination of a rotatable blank carrying turret,

means'for indexing it` a pair of end workf ing tools, one at each side of the turret, means for reciprocating said tools toward and from the turret, means 'at each side of the turret for' gripping a blank during the operation of said tools, andl means for feeding a blank endwise to one or both gripping means.

2. In a metal working machine, the combination of a rotatable blank carrying turret, means for indexing it, a pair of tools, one operatin a-t each side of the turret, means for feeding blanks into operating position at each side of the turret, and means for reciprocating said tools toward andfrom the blanks.

3. In a. metal working machine, the combination of a rotary blank carrying turret,

bination of a rotary blank carrying turret,

means for indexing it, a pair of end Working tools, one at each side of the turret, means for reciprocating said tools toward and from the turret, and means Kfor pushing operated upon at 5. Ina metal Working machine, the combination of a rotaryblank carrying turret,

means for indexing it, a pair of end Working tools, one at each side of the turret, means for reciprocating said tools toward and from the turret, and means for pushing blanks into position to be operated upon at each side of the turret, said tools operating upon opposite endsof the same blank.

6. In a metal Working machine, (thevcombination of a pair of blank carriers, each having a. plurality of alined blank holding means, means for intermittently indexing them, means for feeding blanks to one of said carriers, means for feeding the lblanks from one carrier to the other, an end Working tool cooperating With each carrier, and means for shifting said tools toward and from the carrier.

7 In a metal Working machine, the combination of a pair of alined blank carriers, means for intermittently indexing them, means for feeding blanks to one of said oarriers, means for feeding the blanks lfrom one carrier to the other, an end Working tool cooperating with each carrier, and means for shifting said toolstoward and from the care rier, said tools being duplicates of each other. o

' 8. In ametal Working machine, the combination or a :pair ofblank carriers, means for intermittently indexing them, means for feeding blanks to one of said carriers, means for feeding the blanks from one carrier to the other, a plurality of end Working tools cooperating With each carrier and between Which'the carriers are'located, and means for shifting said tools to and from the carriers.

9. In a metal Working machine, the combination of a pair of blank carriers, means for intermittently indexing them, means for feeding blanks to one of said carriers, means for feeding the blanks from one carrier to the other, a plurality of end Working tools cooperating with each carrier, the tools for one carrier being alined With those of the others, and means for shifting said tools to and from the carriers.

10; In a metal Working machine, the oombination of a rotatable blank carrying turret, means -forl indexing it, a pair of end vWorking tools, means for reciprocating said tools toward and from the turret, and means for feeding a blank into operating positionv at each side thereo-f. A

11. In a metal Working machine, the combination of a rotatable blank carrying tur-V ret, means for indexing it, a pair bf end Working tools, one at each side of the turret, means for reciprocating said tools toward and from the turret, means for feeding a blank to the turret at 011e side thereof, and means for feeding the blankgfrom one side of the turret to the opposite side thereofto be operated upon. v

12. In a metal Working machine, the combination of a rotatable blank carrying turret, meanslfor indexing it, a pair of end Working tools, one at each side of the turret,

means for reciprocating said tools toward andfrom .the,turret, means for feeding a blank to the turret at one side thereof,

'means for feedingthe blank,from one side `means 'forl reciprocating said tools toward and from the turret, meansv for feeding a blank to the turret at one side thereof, meansv for feeding the blank from one side'of the turret to the opposite side thereof to be op* erated upon, meansfor gripping the blanks in the turret, and means for locking the turret after each indexing thereof.

14. In a met-al Working machine, the combination of a rotatable blank carrying turret, means for indexing the turret intermittently, means for locking the turret after each indexing thereof, gripping means carried by the turret for grippinga4 plurality of blanks, means cooperating With said gripping means for effecting the operation thereof, a plurality of end Working tools located at each side of the turret,4 and means for shifting the tools relatively to the turret.

15. In a metal Working machine, the combination of a rotatable blank carrying turret, means for indexing the turret intermittently, means for locking the turret after each indexing thereof, gripping means carried by the turret for gripping a plurality of blanks, means cooperating With means for effecting the operation thereof, a plurality of end -Working tools located at cach side of the turret, means for shifting the tools relatively tothe turret, means for feeding a blank to one side of the turret,h

and means for pushing said blank from one side to the opposite side of the turret into position to be Worked upon.

16. In a metal Working machine, the comsaid gripping 

